NO GEARS

2002 Fiat Punto • 2WD Manual • 90,000 miles

Hi, was doing 40mph in 3rd, shifted gear to 4th and it felt like it had slipped out of gear. Tried putting it back in 4th and still no response from engine. Currently feels like im using the clutch in neutral, except in every gear! There is absolutely no bite, and no transmission to the engine? Help!